Improvement in middlings-separators



J. W.A PYNE. Mddlings-Separators.

No. 210,558. Patented Dec. 3,1878.

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UNITED STATES PATENT @Futon JOHN VALTER PYNE, OF LOUISVILLE, KENTUCKY.

IMPROVEMENT IN MIDDLINGS-SEPARATORS.

Specification forming part of Letters Patent No. 210,558, dated December3, 1878; application filed October 24, 1878.

To all whom t may concern:

Beit known that I, JOHN WALTER PYNE, of Louisville, iu the county ofJefferson and State of Kentucky, have invented a new and valuableImprovement in Middlings-Purilers and I do hereby declare that thefollowing is a full, clear, and exact description of the constructionand operation of the same, reference being had to the annexed drawings,making a partof this specification, and to the letters and figures ofreference marked thereon.

Figure l of the drawings is a representation of a vertical sectionalview of my machine. Fig. 2 is an end view, partly brokenaway, to showthe conveyer-chamber. Fig. 3 is a trans verse sectional view of theriddle, showing the bolt-cloth with the wavemotiou. Fig. 4 is a sideview of the box, showin g'full ythe bracket formed with the curved slot,which produces the longitudinal movement of the riddle by means of thepin lf, as hereinafter explained.

This invention has relation to certain improvements inmiddlings-purifiers, as will be hereinafter more fully set forth, andpointed out in the claims.

The object of the invention is to furnish a cheap apparatus forpurifying middlings and similar materials, which shall be simple inconstruction and effective in operation, doing its lwork as well as, ifnot better and more quickly, than ordinary machines of this class.

Inthe annexed drawings, forming a part of this specication, the letter Arepresents the casing, preferably with glass sides B, so that the millercan easily inspect the interior working of the machine, and see that nowaste is produced.

The top portion, O, of the casing is provided with a series ofopenin gsand regulating-valves leading into a passage or chamber, D, above saidtop G, and in one end of which is formed a fan-case, E, with asuctionfan, E', arranged on the main shaft G. By the action ot' thelatter, bran, light specks, dust, and other light impurities arewithdrawn from the our and middlin gs and blown into a dust room orreceiver. f

The lower or bottom part, F, is constructed in the shape of a troughformed by the i11- v clined boards b, vertical boards c, and bottomboard d, substantially as shown iu Fig. 2 of the drawings.

The bottom board, d, is provided with a series of openings, e, throughwhich the purified middlings are discharged. In this ehamberF isarranged an endless screw or conveyer, H, for conducting the purifiedmaterial to the discharge-openings.

In the middle portion of the machine is placed the sieve or shaker frameI, which is made of such a size as to fit into and move easilyin thechamber or cavity of thc machine. The upper 'surface of the sieve-frameis covered with bolt-cloth of any degree of neness, which hangs loosely,so that in the rapid upand-down movements of the sieve-framc a snap orwave motion (similar to the shaking motion given a carpet to removedust) will be given to the bolt-cloth, which will keepthe chal' andmiddlings well distributed over the bolt-cloth, so that all the-cloth isdoing its duty at the same time. By this means the `cloth is kept cleanand the meshes open without the aid of brushes, knockers, or blastpipes,to enable the tine ilour to pass readily through the cloth to theconveyer-chamber.

A suitable hopper (not shown) is placed on top of the machine, toreceive the material -from the grinding-stones, and from which it isconducted through the chute or passage K onto the head of the sieve,receiving a compound motion.

The sieve or riddle frame is suspended at the ends by means ofconnecting rods or pitmen f, arranged on opposite ends of the machine,the upper ends of which are journaled to cranks It, attached to orforming a part of the main shaft, which is suitably supported bybrackets upon the frame, so that the riddleframe, carrying thebolt-cloth, retains a horizontal, or nearly horizontal, position.

The upper end of the riddle-frame is provided with side journals or pinsk, working in boxes Z, attached to the ends of the machine, the boxesbeing provided with curved slots m, which produces a slight horizontalmotion simultaneously with the perpendicular motion also, by adjustingthe boxes l, the inclination of the sieve can be varied to increase ordecrease the feed of the middlings through the machine. These boxes, aswell as the strips a, act as guides, and prevent any twisting motion ofthe riddle-frame in its rapid movcments.

When the vertical reciprocating motion is communicated to theriddle-frame, carrying the bolt-cloth, a rapid up-and-down movement, atthc rate of about six hundred vibrations per minute, is produced, suchas to cause the middlings upon the bolt-cloth to be thrown upward fromthe bolt-cloth. Additional motion (lateral) is imparted to it, so as tocanse the middlings to travel along the same. rEhe effect of thiscompound motion to the boltcloth is to submit the middlings morethoroughly to the act-ion of the suction-draft while heilig insuspension or thrown upward from the bolt-cloth 5 leaves the lighter andimpure parts of the material on top, so that it maybe more readilyremoved by the suction of the exhaust-fan; and also, when returning tothe bolt-cloth, an impetus is given to the mid diin gs, whereby thefiner portions more readily fall through the bolt-cloth, and the coarsestuit is caused to pass onward and finally over the tail end of thebolt-cloth to a receptacle to receive it. The middlings and fine flourpassing through the bolt-cloth are conducted to a conveyer-chamberbelow.

rlhe cranks of the main shaft should move together, so that theriddle-frame is raised and lowered bodily.

The conveyer is driven from the main shaftby means of a belt passingover pulleys suitably arranged on the shaft and at the end of theconveyer-shaft. The air is admitted from the outside through an opening,N, in the casin g below the riddle-frame, as shown by the arrow in Fig.l of the drawings. This admitted air passes upward through the sieve bysuction, carrying therewith the light material, separated from themiddlin gs and iiour, into the fan-case, as shown by the arrows.

At the tail end of the machine is arranged a vertical oblong tube orpassage, M, communicating with the fan-case, to carry off the lightbran, &c., from that end of the machine, which might obstruct thepassage at certain times.

It will be observed that I take the air cntirely froln the head end ofthe machine below the riddle-frame, thereby producing heavy cnn rents ofair to the tail end, so that if any spccks or light impurities shouldpass through the bolt-cloth they are carried to the tail end ot' themachine in the conveyer-chamber by the arrow 2, and cut off from thegood stuff by means of the openings e2 in the bottom board. By means ofthe air entering at this point I get a double separation, and producebetter results than in machines heretofore made.

Power to drive the machine is communicated through a belt to the pulleyIt from the movin g power of the mill.

What I claim as myinvention, and desire to secure by Letters Patent, is-

1. A sieve or riddle of a middlingspurier, the bolting material of whichhangs loosely, so that in the vertically-reciprocating motion of theriddle, caused by mechanism, a wave-niotion is given to itsbolting-surface, substantially as set forth.

2. A sieve or riddle with its bolting material hanging loosely, having`a compound motionto wit, a rapid vertical and longitudinal movement-anda wave-motion to the boltin g matcrial, caused by mechanism,substantially as dcscribed.

3. rlhe combination, substantially as described, of the casing having aseries of openings at the bottom for the discharge of the purifiedmaterial and an opening at the head end of the casing for the admissionof air into the machine, a vertically-reciprocating riddle, and asuction-fan.

4. Thecombination,withavertically-moving riddle-frame having sidejournals, of the adjustable boxes having curved slots for communicatinga longitudinal motion to said frame.

5. The combination, in a middlings-puriiier, of the main shaft, having asuction-fan, pulleys, and a crank at each end of the sha-ft, the pitmen,the riddle-frame, and mechanism for operating the conveyer,substantially as set forth.

In testimony whereof` I have hereunto subscribed my name.

JOHN 'WALTER PYNE.

Witnesses M. C. TULLY, GEO. M. PAGE.

